After some looking I`ve found a decent Cessna 152 for rent in Shoreham for 85£ per hour wet + 30 £ per month, looks good and the owner seamed nice ! :)

Does anyone here have any experience from flying and the weather around Shoreham and Brighton area? :)

Further, do I need an UK telephony licence when I have the JAR-FCL PPL-A with ICAO radiotelephony which allows me to fly around the globe with no restrictions in radio use? :) ( If I`ve understood it right)

Adam :)

Perfectly legal as long as it is maintained as if were a rental aircraft, I.e. To what used to be called PT standards.

Weather around Shoreham should be ok at the time of year you are looking at, though expect to lose the odd day or two with it.